Multi-family report

1923 Diamond St

9 bd3 ba3 stories3,409 sqftRM1built 1915

Property at a glanceApartment building

Individual, other or unknown mailing address

2026 assessment
$290K OPA value, not a listing price
From above · selected parcel outlined; choose a neighboring polygon to open it — imagery © Esri, Maxar

Assessment and City record timeline

Published City assessments for this building against its block and ZIP. Dated City filings are marked on the same line. Select one to read it. Assessments are tax-roll values, not sale prices or appraisals.

$0$500K$1.0MZIP 19121 (Brewerytown · Sharswood) median$406K200820122016202020242027
Property assessmentBlock median & rangeZIP 19121 (Brewerytown · Sharswood) medianAssessmentDeed / saleL&I violationPermitInspectionLicenseCertification

Scroll horizontally to move through the years. Each icon sits on its recorded date; records without a day are labeled and centered within their year. Select one to explain the filing.

Highlight
Every dated record41 events · exact dates, newest first
  1. InspectionL&I investigation
  2. LicenseRob Newlin: Rental landlord or residential registration marked inactive
  3. CertificationFire Alarm Certification
  4. L&I violationEXTERIOR AREA SANITATION
  5. L&I violationEXTERIOR STRUCTURE STAIRS, DECKS, PORCHES
  6. L&I violationEXTERIOR STRUCTURE PROTECTIVE TREATMENT
  7. L&I violationEXTERIOR STRUCTURE DECORATIVE FEATURES
  8. L&I violationEXTERIOR AREA WEEDS
  9. InspectionL&I investigation
  10. CertificationFire Alarm Certification
  11. LicenseYOKE TIONG TAN: Rental landlord or residential registration marked inactive
  12. LicenseRob Newlin: Rental landlord or residential registration initially issued
  13. Deed / saleDeed / sale $315K
  14. InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
  15. L&I violationFA-INSTALL BOX
  16. L&I violationFIRE EXTING-INSTALL R2
  17. L&I violationFA-IMM REP/RET TO SRVC
  18. L&I violationANNUAL CERT FIRE ALARM
  19. InspectionHCEU INSP (Housing Code Enforcement Unit inspection)
  20. LicenseYOKE TIONG TAN: Rental landlord or residential registration initially issued
  21. LicenseJONATHAN GROSSMAN: Rental landlord or residential registration marked inactive
  22. Deed / saleDeed / sale $220K
  23. LicenseJONATHAN GROSSMAN: Rental landlord or residential registration initially issued
  24. PermitElectrical
  25. L&I violationPERM - MUST POST
  26. PermitSuppression
  27. PermitElectrical
  28. Deed / saleDeed / sale $250K
  29. PermitMajor alteration
  30. PermitPlumbing
  31. InspectionPRECOURT (likely: pre-court compliance inspection)
  32. L&I violationPERMB- ALTER REPAIR INT PART (Building permit required for interior alteration or repair)
  33. L&I violationPERMB- REV WK GONE BEYOND ORIG
  34. InspectionBP_BLDG
  35. InspectionBP_BLDG
  36. PermitDemolition
  37. PermitUse
  38. PermitZoning
  39. L&I violationPERMB- INT DEMOL WALLS ETC
  40. L&I violationSWO- CONSTR W/O BLDG PERMIT (Stop-work order for construction without a building permit)
  41. InspectionBP_BLDG

Flags: 5 open L&I violations. Informational only. Not investment advice or a consumer report (FCRA).

Verify the public record

$4,059/year estimated property tax

2026 taxable assessment $290,000 × 1.3998%. This is an estimate, not a bill or account balance. The City maintains payments, credits, interest, and the current amount due.

OPA has published a 2027 assessment of $406,200. It is not the 2026 billed-year value.

Current City balanceCheck Tax Center

Payments, credits, interest, and the current amount due are maintained by the City.

OPA 321186800
Open Philadelphia Tax Center →Use “View period balance” to inspect each tax year.
Exemption classificationNo exemption shown

2026 taxable assessment equals the full assessed value.

Historical delinquency sources No current conclusion

This parcel did not match the June 2022 delinquency snapshot. That absence does not confirm the account is current today.

For a purchase, refinance, or closing, request the City’s official Property Payoff statement in Tax Center under “More options.”

The property, on paper

OPA physical field record.

Bedrooms
9
Bathrooms
3
Stories
3
Interior
3,409 sqft livable area
Lot
1,680 sqft
Central air
Yes
Exterior condition
Average city code 4
Interior condition
Average city code 4
Quality grade
C+ assessor's grade
Zoning
RM1 city zoning code

OPA field-assessment attributes. Condition and grade are the assessor's codes, not an inspection.

Block context

1900 block of Diamond St. Compare parcels, ownership, and public-record history.

See the whole block →

Next door: 1921 Diamond St  ·  1925 Diamond St

Business licenses at this address Latest pull

What L&I has registered at this OPA parcel, newest initial license date first.

Open the City record ↗

No L&I business license is on record at this address in data through Jul 23, 2026.

Landlord and residential filings

These are property registrations or landlord filings, not businesses operating at this address.

Rob NewlinInactive

Rental · Initial issue date Mar 27, 2018 · Terminal license date May 25, 2026

YOKE TIONG TANInactive

Rental · Initial issue date Nov 25, 2014 · Terminal license date Apr 29, 2018

JONATHAN GROSSMANInactive

Rental · Initial issue date Aug 19, 2011 · Terminal license date Nov 25, 2014

A license is an L&I registration, not proof that a business is open, operating today, or located at this storefront. Dates are license dates. Events are deduped by parcel, business identity, and license type, so a renewal is not shown as another opening. Other permit and filing types remain in the full source ledger.

Open every source row 41 dated rows
  1. InvestigationL&I investigation

    Case CF-2025-043792 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  2. License terminal eventRob Newlin: Rental landlord or residential registration marked inactive

    License 770566 · Inactive

    License event. Registration does not prove present operation or storefront occupancy.

  3. CertificationFire Alarm Certification

    Certification BC-2025-018009 · Certified

    Expires 2026-07-01

  4. ViolationEXTERIOR AREA SANITATION

    Case CF-2025-043792 · Violation VI-2025-033002 · Code PM15-302.1 · OPEN

  5. ViolationEXTERIOR STRUCTURE STAIRS, DECKS, PORCHES

    Case CF-2025-043792 · Violation VI-2025-033003 · Code PM15-304.10 · OPEN

  6. ViolationEXTERIOR STRUCTURE PROTECTIVE TREATMENT

    Case CF-2025-043792 · Violation VI-2025-033004 · Code PM15-304.2 · OPEN

  7. ViolationEXTERIOR STRUCTURE DECORATIVE FEATURES

    Case CF-2025-043792 · Violation VI-2025-033005 · Code PM15-304.8 · OPEN

  8. ViolationEXTERIOR AREA WEEDS

    Case CF-2025-043792 · Violation VI-2025-033006 · Code PM15-302.4 · OPEN

  9. InvestigationL&I investigation

    Case CF-2025-043792 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  10. CertificationFire Alarm Certification

    Certification BC-2022-009307 · Certified

    Expires 2023-06-23

  11. License terminal eventYOKE TIONG TAN: Rental landlord or residential registration marked inactive

    License 648403 · Inactive

    License event. Registration does not prove present operation or storefront occupancy.

  12. License issue eventRob Newlin: Rental landlord or residential registration initially issued

    License 770566 · Inactive

    License event. Registration does not prove present operation or storefront occupancy.

  13. Recorded transfer$315K transfer

    2018

  14. InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)

    Case 497857 · PASSED

    A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked passed.

  15. ViolationFA-INSTALL BOX

    Case 497857 · Violation 3680262 · Code FC-907.4/1 · COMPLIED

    City marked this violation complied with; check the resolution date and live case for what was accepted.

  16. ViolationFIRE EXTING-INSTALL R2

    Case 497857 · Violation 3680246 · Code FC-906.2/1 · COMPLIED

    City marked this violation complied with; check the resolution date and live case for what was accepted.

  17. ViolationFA-IMM REP/RET TO SRVC

    Case 497857 · Violation 3680232 · Code FC-901.6/17 · COMPLIED

    City marked this violation complied with; check the resolution date and live case for what was accepted.

  18. ViolationANNUAL CERT FIRE ALARM

    Case 497857 · Violation 3680233 · Code FC-915.1/3 · COMPLIED

    City marked this violation complied with; check the resolution date and live case for what was accepted.

  19. InvestigationHCEU INSP (Housing Code Enforcement Unit inspection)

    Case 497857 · FAILED

    A legacy L&I inspection label. The unit inspected housing for property-maintenance, fire-prevention, and related code compliance; the separate status says how that visit ended. The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  20. License issue eventYOKE TIONG TAN: Rental landlord or residential registration initially issued

    License 648403 · Inactive

    License event. Registration does not prove present operation or storefront occupancy.

  21. License terminal eventJONATHAN GROSSMAN: Rental landlord or residential registration marked inactive

    License 541956 · Inactive

    License event. Registration does not prove present operation or storefront occupancy.

  22. Recorded transfer$220K transfer

    2012

  23. License issue eventJONATHAN GROSSMAN: Rental landlord or residential registration initially issued

    License 541956 · Inactive

    License event. Registration does not prove present operation or storefront occupancy.

  24. PermitElectrical

    Permit 223082 · COMPLETED

    INSTALL FIRE ALARM SYSTEM AS PER NFPA72 (NORTH DISTRICT)

  25. ViolationPERM - MUST POST

    Case 153398 · Violation 1388932 · Code A-302.8/30 · COMPLIED

    City marked this violation complied with; check the resolution date and live case for what was accepted.

  26. PermitSuppression

    Permit 222385 · COMPLETED

    INSTALL NEW FIRE SERVICE CONNECTED TO CITY WATER MAIN & SPRINKLERS THRU-OUT PER PLANS.

  27. PermitElectrical

    Permit 206310 · COMPLETED

    INSTALL 200AMP SERVICE WITH 4 GANG METER AND RE WIRE 3 FAMILY DWELLING AS PER 2005 (NORTH DISTRICT) NO FIRE ALARM ON THIS PERMIT

  28. Recorded transfer$250K transfer

    2009

  29. PermitMajor alteration

    Permit 153398 · COMPLETED

    HISTORICAL REGISTERED PROPERTY. FOR THE TOTAL REHABILITATION OF AN EXISTING STRUCTURE TO BE USED A A NEW THREE FAMILY DWELLING AS SHOWN ON THE APPROVED PLANS. ALL WORK SHALL BE PERFORMED BY A LICENSED CONTRACTOR REGISTERED IN THE CITY OF PHILADELPHIA.

  30. PermitPlumbing

    Permit 164978 · COMPLETED

    3" STACK, RE-ROUGH TWO BATHROOMS. 2" ATACK, (2) 1-1/2" KITCHEN SINK DRAINS. ROUGH-OUT ONLY

  31. InvestigationPRECOURT (likely: pre-court compliance inspection)

    Case 155954 · PASSED

    A follow-up before or during enforcement escalation; confirm the case sequence in the City file. The cited inspection visit was marked passed.

  32. ViolationPERMB- ALTER REPAIR INT PART (Building permit required for interior alteration or repair)

    Case 155954 · Violation 963758 · Code A-301.1/4 · COMPLIED

    City marked this violation complied with; check the resolution date and live case for what was accepted.

  33. ViolationPERMB- REV WK GONE BEYOND ORIG

    Case 147149 · Violation 964076 · Code A-302.10/3 · CLOSEDCASE

    City marked the case closed; that does not mean the original condition never existed.

  34. InvestigationBP_BLDG

    Case 155954 · CLOSED

    City marked the record closed; open the case for the closing reason.

  35. InvestigationBP_BLDG

    Case 155954 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

  36. PermitDemolition

    Permit 147149 · COMPLETED

    INTERIOR DEMOLITION OF NON BEARING PARTITIONS INTERIOR WORK ONLY

  37. PermitUse

    Permit 148237 · COMPLETED

    FOR A THREE (3) FAMILY DWELLING.

  38. PermitZoning

    Permit 145967 · COMPLETED

    USE CHANGE-FROM 2 APARTMENT DWELLING TO 3 APARTMENT DWELLING; 1ST FLR-1 APARTMENT; 2ND FLR- 1 APARTMENT; 3RD FLR-ONE APARTMENT; DEMO REAR TWO-STORY ADDITION (9X13'10")

  39. ViolationPERMB- INT DEMOL WALLS ETC

    Case 155954 · Violation 963094 · Code A-301.1/7 · COMPLIED

    City marked this violation complied with; check the resolution date and live case for what was accepted.

  40. ViolationSWO- CONSTR W/O BLDG PERMIT (Stop-work order for construction without a building permit)

    Case 155954 · Violation 963093 · Code A-504.1/3 · COMPLIED

    City marked this violation complied with; check the resolution date and live case for what was accepted.

  41. InvestigationBP_BLDG

    Case 155954 · FAILED

    The cited inspection visit was marked failed; later rows may show follow-up or resolution.

Where this comes from

Methodology & freshness

This report was assembled Jul 23, 2026, 4:55 PM ET. Available City datasets are queried from OpenDataPhilly (phl.carto.com) and the cited City ArcGIS feeds; record queries paginate rather than silently taking a first page. For this property: Permits: queried · Violations: queried · Investigations: queried · Appeals: queried · Licenses: queried · Building certifications: queried. “Unavailable” means the source query failed or was not supplied, not “no record.” Reports re-pull on view after seven days and on an overnight rolling schedule; citywide benchmarks recompute weekly. Source dates still govern: the parcel-level tax-delinquency snapshot is June 2022 and the separate detailed tax ledger ends in 2016, so neither establishes today’s balance. The live balance and date-effective payoff must be verified in Tax Center. AI-written passages are grounded in the assembled record and rejected if they state a number the record does not hold.

Official city record ↗  ·  L&I history ↗  ·  See the whole block  ·  Download this record (JSON)